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<?php |
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namespace Upress\EzCache\ThirdParty; |
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|
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/** |
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* Class Minify_CSS_UriRewriter |
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* |
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* @package Minify |
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*/ |
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|
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/** |
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* Rewrite file-relative URIs as root-relative in CSS files |
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* |
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* @package Minify |
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* @author Stephen Clay <steve@mrclay.org> |
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*/ |
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class Minify_CSS_UriRewriter { |
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|
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/** |
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* rewrite() and rewriteRelative() append debugging information here |
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* |
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* @var string |
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*/ |
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public static $debugText = ''; |
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|
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/** |
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* In CSS content, rewrite file relative URIs as root relative |
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* |
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* @param string $css |
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* |
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* @param string $currentDir The directory of the current CSS file. |
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* |
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* @param string $docRoot The document root of the web site in which |
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* the CSS file resides (default = $_SERVER['DOCUMENT_ROOT']). |
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* |
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* @param array $symlinks (default = array()) If the CSS file is stored in |
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* a symlink-ed directory, provide an array of link paths to |
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* target paths, where the link paths are within the document root. Because |
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* paths need to be normalized for this to work, use "//" to substitute |
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* the doc root in the link paths (the array keys). E.g.: |
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* <code> |
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* array('//symlink' => '/real/target/path') // unix |
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* array('//static' => 'D:\\staticStorage') // Windows |
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* </code> |
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* |
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* @return string |
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*/ |
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public static function rewrite($css, $currentDir, $docRoot = null, $symlinks = array()) |
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{ |
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self::$_docRoot = self::_realpath( |
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$docRoot ? $docRoot : $_SERVER['DOCUMENT_ROOT'] |
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); |
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self::$_currentDir = self::_realpath($currentDir); |
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self::$_symlinks = array(); |
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|
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// normalize symlinks in order to map to link |
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foreach ($symlinks as $link => $target) { |
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$link = ($link === '//') ? self::$_docRoot : str_replace('//', self::$_docRoot . '/', $link); |
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$link = strtr($link, '/', DIRECTORY_SEPARATOR); |
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|
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self::$_symlinks[$link] = self::_realpath($target); |
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} |
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|
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self::$debugText .= "docRoot : " . self::$_docRoot . "\n" |
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. "currentDir : " . self::$_currentDir . "\n"; |
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if (self::$_symlinks) { |
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self::$debugText .= "symlinks : " . var_export(self::$_symlinks, 1) . "\n"; |
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} |
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self::$debugText .= "\n"; |
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|
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$css = self::_trimUrls($css); |
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|
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$css = self::_owlifySvgPaths($css); |
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|
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// rewrite |
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$pattern = '/@import\\s+([\'"])(.*?)[\'"]/'; |
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$css = preg_replace_callback($pattern, array(self::$className, '_processUriCB'), $css); |
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|
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$pattern = '/url\\(\\s*([\'"](.*?)[\'"]|[^\\)\\s]+)\\s*\\)/'; |
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$css = preg_replace_callback($pattern, array(self::$className, '_processUriCB'), $css); |
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|
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$css = self::_unOwlify($css); |
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|
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return $css; |
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} |
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|
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/** |
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* In CSS content, prepend a path to relative URIs |
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* |
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* @param string $css |
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* |
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* @param string $path The path to prepend. |
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* |
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* @return string |
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*/ |
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public static function prepend($css, $path) |
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{ |
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self::$_prependPath = $path; |
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|
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$css = self::_trimUrls($css); |
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|
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$css = self::_owlifySvgPaths($css); |
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|
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// append |
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$pattern = '/@import\\s+([\'"])(.*?)[\'"]/'; |
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$css = preg_replace_callback($pattern, array(self::$className, '_processUriCB'), $css); |
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|
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$pattern = '/url\\(\\s*([\'"](.*?)[\'"]|[^\\)\\s]+)\\s*\\)/'; |
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$css = preg_replace_callback($pattern, array(self::$className, '_processUriCB'), $css); |
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|
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$css = self::_unOwlify($css); |
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|
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self::$_prependPath = null; |
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|
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return $css; |
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} |
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|
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/** |
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* Get a root relative URI from a file relative URI |
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* |
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* <code> |
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* Minify_CSS_UriRewriter::rewriteRelative( |
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* '../img/hello.gif' |
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* , '/home/user/www/css' // path of CSS file |
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* , '/home/user/www' // doc root |
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* ); |
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* // returns '/img/hello.gif' |
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* |
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* // example where static files are stored in a symlinked directory |
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* Minify_CSS_UriRewriter::rewriteRelative( |
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* 'hello.gif' |
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* , '/var/staticFiles/theme' |
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* , '/home/user/www' |
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* , array('/home/user/www/static' => '/var/staticFiles') |
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* ); |
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* // returns '/static/theme/hello.gif' |
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* </code> |
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* |
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* @param string $uri file relative URI |
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* |
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* @param string $realCurrentDir realpath of the current file's directory. |
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* |
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* @param string $realDocRoot realpath of the site document root. |
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* |
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* @param array $symlinks (default = array()) If the file is stored in |
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* a symlink-ed directory, provide an array of link paths to |
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* real target paths, where the link paths "appear" to be within the document |
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* root. E.g.: |
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* <code> |
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* array('/home/foo/www/not/real/path' => '/real/target/path') // unix |
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* array('C:\\htdocs\\not\\real' => 'D:\\real\\target\\path') // Windows |
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* </code> |
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* |
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* @return string |
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*/ |
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public static function rewriteRelative($uri, $realCurrentDir, $realDocRoot, $symlinks = array()) |
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{ |
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// prepend path with current dir separator (OS-independent) |
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$path = strtr($realCurrentDir, '/', DIRECTORY_SEPARATOR); |
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$path .= DIRECTORY_SEPARATOR . strtr($uri, '/', DIRECTORY_SEPARATOR); |
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|
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self::$debugText .= "file-relative URI : {$uri}\n" |
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. "path prepended : {$path}\n"; |
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|
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// "unresolve" a symlink back to doc root |
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foreach ($symlinks as $link => $target) { |
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if (0 === strpos($path, $target)) { |
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// replace $target with $link |
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$path = $link . substr($path, strlen($target)); |
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|
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self::$debugText .= "symlink unresolved : {$path}\n"; |
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break; |
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} |
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} |
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// strip doc root |
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$path = substr($path, strlen($realDocRoot)); |
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|
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self::$debugText .= "docroot stripped : {$path}\n"; |
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|
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// fix to root-relative URI |
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$uri = strtr($path, '/\\', '//'); |
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$uri = self::removeDots($uri); |
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|
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self::$debugText .= "traversals removed : {$uri}\n\n"; |
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|
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return $uri; |
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} |
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|
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/** |
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* Remove instances of "./" and "../" where possible from a root-relative URI |
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* |
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* @param string $uri |
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* |
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* @return string |
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*/ |
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public static function removeDots($uri) |
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{ |
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$uri = str_replace('/./', '/', $uri); |
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// inspired by patch from Oleg Cherniy |
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do { |
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$uri = preg_replace('@/[^/]+/\\.\\./@', '/', $uri, 1, $changed); |
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} while ($changed); |
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|
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return $uri; |
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} |
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|
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/** |
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* Defines which class to call as part of callbacks, change this |
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* if you extend Minify_CSS_UriRewriter |
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* |
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* @var string |
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*/ |
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protected static $className = '\Upress\EzCache\ThirdParty\Minify_CSS_UriRewriter'; |
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|
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/** |
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* Get realpath with any trailing slash removed. If realpath() fails, |
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* just remove the trailing slash. |
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* |
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* @param string $path |
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* |
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* @return mixed path with no trailing slash |
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*/ |
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protected static function _realpath($path) |
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{ |
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$realPath = realpath($path); |
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if ($realPath !== false) { |
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$path = $realPath; |
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} |
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|
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return rtrim($path, '/\\'); |
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} |
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|
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/** |
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* Directory of this stylesheet |
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* |
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* @var string |
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*/ |
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private static $_currentDir = ''; |
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|
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/** |
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* DOC_ROOT |
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* |
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* @var string |
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*/ |
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private static $_docRoot = ''; |
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|
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/** |
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* directory replacements to map symlink targets back to their |
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* source (within the document root) E.g. '/var/www/symlink' => '/var/realpath' |
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* |
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* @var array |
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*/ |
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private static $_symlinks = array(); |
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|
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/** |
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* Path to prepend |
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* |
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* @var string |
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*/ |
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private static $_prependPath = null; |
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|
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/** |
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* @param string $css |
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* |
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* @return string |
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*/ |
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private static function _trimUrls($css) |
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{ |
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$pattern = '/ |
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url\\( # url( |
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\\s* |
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([^\\)]+?) # 1 = URI (assuming does not contain ")") |
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\\s* |
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\\) # ) |
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/x'; |
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|
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return preg_replace($pattern, 'url($1)', $css); |
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} |
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|
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/** |
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* @param array $m |
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* |
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* @return string |
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*/ |
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private static function _processUriCB($m) |
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{ |
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// $m matched either '/@import\\s+([\'"])(.*?)[\'"]/' or '/url\\(\\s*([^\\)\\s]+)\\s*\\)/' |
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$isImport = ($m[0][0] === '@'); |
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// determine URI and the quote character (if any) |
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if ($isImport) { |
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$quoteChar = $m[1]; |
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$uri = $m[2]; |
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} else { |
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// $m[1] is either quoted or not |
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$quoteChar = ($m[1][0] === "'" || $m[1][0] === '"') ? $m[1][0] : ''; |
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|
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$uri = ($quoteChar === '') ? $m[1] : substr($m[1], 1, strlen($m[1]) - 2); |
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} |
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|
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if ($uri === '') { |
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return $m[0]; |
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} |
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|
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// if not root/scheme relative and not starts with scheme |
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if (!preg_match('~^(/|[a-z]+\:)~', $uri)) { |
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// URI is file-relative: rewrite depending on options |
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if (self::$_prependPath === null) { |
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$uri = self::rewriteRelative($uri, self::$_currentDir, self::$_docRoot, self::$_symlinks); |
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} else { |
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$uri = self::$_prependPath . $uri; |
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if ($uri[0] === '/') { |
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$root = ''; |
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$rootRelative = $uri; |
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$uri = $root . self::removeDots($rootRelative); |
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} elseif (preg_match('@^((https?\:)?//([^/]+))/@', $uri, $m) && (false !== strpos($m[3], '.'))) { |
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$root = $m[1]; |
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$rootRelative = substr($uri, strlen($root)); |
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$uri = $root . self::removeDots($rootRelative); |
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} |
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} |
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} |
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|
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if ($isImport) { |
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return "@import {$quoteChar}{$uri}{$quoteChar}"; |
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} else { |
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return "url({$quoteChar}{$uri}{$quoteChar})"; |
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} |
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} |
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|
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/** |
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* Mungs some inline SVG URL declarations so they won't be touched |
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* |
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* @link https://github.com/mrclay/minify/issues/517 |
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* @see _unOwlify |
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* |
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* @param string $css |
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* @return string |
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*/ |
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private static function _owlifySvgPaths($css) |
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{ |
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$pattern = '~\b((?:clip-path|mask|-webkit-mask)\s*\:\s*)url(\(\s*#\w+\s*\))~'; |
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|
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return preg_replace($pattern, '$1owl$2', $css); |
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} |
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|
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/** |
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* Undo work of _owlify |
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* |
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* @see _owlifySvgPaths |
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* |
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* @param string $css |
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* @return string |
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*/ |
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private static function _unOwlify($css) |
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{ |
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$pattern = '~\b((?:clip-path|mask|-webkit-mask)\s*\:\s*)owl~'; |
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|
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return preg_replace($pattern, '$1url', $css); |
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} |
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} |
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|
